Looking at its tranquil location in farmland near Brecon today, you’d never guess that Gaer was once one of the Romans’ largest inland forts and a vital link in the occupiers’ defensive network in Wales. Founded around AD 75, it was situated in a strategic position at the meeting point of two major roads and manned by highly trained legionaries of the Vettonian Spanish Cavalry Regiment.
In Roman times this was a busy site, with a large guardhouse, granary and heated bathhouse. Today you can see remains of a number of defensive towers, alongside two large gateways with walls standing 8ft/2.4m high in places.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.